Patents by Inventor Hang T. Pham

Hang T. Pham has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • AZEOTROPE-LIKE COMPOSITIONS OF 1,1,2,3,3-PENTAFLUOROPROPENE
    Publication number: 20090156702
    Abstract: The invention pertains to azeotrope-like compositions of 1,1,2,3,3-pentafluoropropene (HFC-1225yc) and any one of 1,1,1,2-tetrafluoropropene (HFC-1234yf) or the Z-isomer of 1,1,1,2,3-pentafluoropropene (HFC-1225yeZ), and uses thereof, including use in refrigerant compositions, refrigeration systems, blowing agent compositions, and aerosol propellants.
    Type: Application
    Filed: December 13, 2007
    Publication date: June 18, 2009
    Inventors: Ryan J. Hulse, Hang T. Pham, Rajiv R. Singh
  • AZEOTROPE-LIKE COMPOSITIONS OF PENTAFLUOROPROPENE AND 1,1,1,2,2-PENTAFLUOROPROPANE
    Publication number: 20090151365
    Abstract: The present invention provides azeotrope-like compositions of 1,1,1,2,2-pentafluoropropane (HFC-245cb) with either the Z isomer of 1,1,1,2,3-pentafluoropropene (HFO-1225yeZ) alone or with mixtures of the E and Z isomers of 1,1,1,2,3-pentafluoropropene (HFO-1225 yeZ and HFO-1225 yeE) and uses thereof, including use in refrigerant compositions, refrigeration systems, blowing agent compositions, and aerosol propellants, and in process for separating azeotrope-like mixtures.
    Type: Application
    Filed: December 13, 2007
    Publication date: June 18, 2009
    Inventors: Hang T. Pham, Ryan J. Hulse, Rajiv R. Singh
  • Azeotropic fumigant compositions of methyl iodide
    Patent number: 7544306
    Abstract: Azeotropic and azeotrope-like compositions of methyl iodide and at least one fluorocarbon or hydrofluorocarbon such as 1,1,1,3,3-pentafluoropropane (HFC-245fa). The compositions are present as a gas, at temperatures of about 30° C. or below. The inventive compositions serve as a non-ozone-depleting gaseous fumigant which is useful in a variety of applications, in place of methyl bromide. These compositions serve as a drop-in replacement for gaseous methyl bromide, providing the benefits of a methyl iodide fumigant while also utilizing existing methyl bromide equipment.
    Type: Grant
    Filed: February 16, 2007
    Date of Patent: June 9, 2009
    Assignee: Honeywell International Inc.
    Inventors: Andrew J. Poss, Rajiv R. Singh, Hang T. Pham
  • Compositions containing fluorine substituted olefins
    Patent number: 7534366
    Abstract: The use of pentafluoropropene (HFO-1225) and tetrafluoropropene (HFO-1234) in refrigeration equipment is disclosed. These materials are generally useful as refrigerants for heating and cooling, as blowing agents, as aerosol propellants, as solvent composition, and as fire extinguishing and suppressing agents.
    Type: Grant
    Filed: October 27, 2003
    Date of Patent: May 19, 2009
    Assignee: Honeywell International Inc.
    Inventors: Rajiv R. Singh, Hang T. Pham, David P. Wilson, Raymond H. Thomas, Ian Shankland
  • Azeotrope-like compositions of tetrafluoropropene and hydrofluorocarbons
    Patent number: 7524805
    Abstract: Provided are azeotrope-like compositions comprising tetrafluoropropene and hydrofluorocarbons and uses thereof, including use in refrigerant compositions, refrigeration systems, blowing agent compositions, and aerosol propellants.
    Type: Grant
    Filed: April 29, 2004
    Date of Patent: April 28, 2009
    Assignee: Honeywell International Inc.
    Inventors: Rajiv R. Singh, Hang T. Pham, Gary M. Knopeck, Louis E. Herena, Jeremy N. Diringer
  • AZEOTROPE-LIKE COMPOSITIONS OF DIFLUOROMETHANE AND TRIFLUOROIODOMETHANE
    Publication number: 20090092556
    Abstract: Provided are azeotrope-like compositions comprising difluoromethane and trifluoroiodomethane and uses thereof, including use in refrigerant compositions, refrigeration systems, blowing agent compositions, and aerosol propellants.
    Type: Application
    Filed: December 15, 2008
    Publication date: April 9, 2009
    Applicant: Honeywell International Inc.
    Inventors: Rajiv R. Singh, Hang T. Pham, David P. Wilson
  • AZEOTROPE-LIKE COMPOSITIONS OF 1-CHLORO-3,3,3-TRIFLUOROPROPENE AND METHYL IODIDE
    Publication number: 20090041677
    Abstract: An azeotropic or azeotrope-like composition comprising a mixture of methyl iodide, 1-chloro-3,3,3,-trifluoropropene, and optionally one or more of fluorocarbons and/or hydrofluorocarbons. The compositions are present as a gas, at temperatures of about 30° C. or below. The inventive compositions serve as a non-ozone-depleting gaseous fumigant which is useful in a variety of applications, in place of methyl bromide. These compositions serve as a drop-in replacement for gaseous methyl bromide, providing the benefits of a methyl iodide fumigant while also utilizing existing methyl bromide equipment.
    Type: Application
    Filed: October 27, 2008
    Publication date: February 12, 2009
    Inventors: Rajiv R. Singh, Hang T. Pham, Andrew J. Poss
  • Azeotrope-like compositions of difluoromethane and trifluoroiodomethane
    Patent number: 7479477
    Abstract: Provided are azeotrope-like compositions comprising difluoromethane and trifluoroiodomethane and uses thereof, including use in refrigerant compositions, refrigeration systems, blowing agent compositions, and aerosol propellants.
    Type: Grant
    Filed: April 18, 2005
    Date of Patent: January 20, 2009
    Assignee: Honeywell International Inc.
    Inventors: David P. Wilson, Hang T. Pham, Rajiv R. Singh
  • AZEOTROPE-LIKE COMPOSITIONS OF TETRAFLUOROPROPENE AND HYDROFLUOROCARBONS
    Publication number: 20080308763
    Abstract: Provided are azeotrope-like compositions comprising tetrafluoropropene and hydrofluorocarbons and uses thereof, including use in refrigerant compositions, refrigeration systems, blowing agent compositions, and aerosol propellants.
    Type: Application
    Filed: August 26, 2008
    Publication date: December 18, 2008
    Applicant: Honeywell Internatinal Inc.
    Inventors: Rajiv R. Singh, Hang T. Pham, Gary M. Knopeck, Louis E. Herena, Jeremy N. Diringer
  • Azeotrope-like compositions of difluoromethane and trifluoroiodomethane
    Patent number: 7465698
    Abstract: Provided are azeotrope-like compositions comprising difluoroethane and trifluoroiodomethane, azeotrope-like compositions comprising difluoroethane, tetrafluoropropene and trifluoroiodomethane, and uses thereof, including use in refrigerant compositions, refrigeration systems, blowing agent compositions, aerosol propellants and others.
    Type: Grant
    Filed: April 18, 2005
    Date of Patent: December 16, 2008
    Assignee: Honeywell International Inc.
    Inventors: David P. Wilson, Hang T. Pham, Rajiv R. Singh
  • AEROSOL COMPOSITIONS CONTAINING FLUORINE SUBSTITUTED OLEFINS AND METHODS AND SYSTEMS USING SAME
    Publication number: 20080292564
    Abstract: Various compositons, including particularly aerosol compositions, containing fluorinated olefins, including particularly tetra- and penta-fluorpropenes, in a variety of applications are disclosed.
    Type: Application
    Filed: September 4, 2007
    Publication date: November 27, 2008
    Applicant: Honeywell International, Inc.
    Inventors: Rajiv R. Singh, Hang T. Pham, David P. Wilson, Raymond H. Thomas, Mark W. Spatz, David A. Metcalf
  • AZEOTROPE-LIKE COMPOSITIONS OF PENTAFLUOROPROPANE AND CHLOROPROPANE
    Publication number: 20080279790
    Abstract: This invention provides azeotrope-like compositions of 1,1,1,3,3-pentafluoropropane and 2-chloropropane that are environmentally desirable for use as refrigerants, aerosol propellants, metered dose inhalers, blowing agents for polymer foam, heat transfer media, and gaseous dielectrics.
    Type: Application
    Filed: July 22, 2008
    Publication date: November 13, 2008
    Applicant: Honeywell International Inc.
    Inventors: Hang T. Pham, Gary Knopeck, Ronald Riegal, Mary C. Bogdan, Leslie Bement, David J. Williams
  • Azeotrope-like compositions of tetrafluoropropene and alcohols
    Publication number: 20080255260
    Abstract: A composition including an effective amount of trans-1,3,3,3-tetrafluoropropene component combined with an effective amount of an alcohol selected from the group of methanol, ethanol, propanol, isopropanol, tert-butanol, isobutanol, 2-ethyl hexanol and any combination thereof, where the composition has azeotropic properties.
    Type: Application
    Filed: April 16, 2007
    Publication date: October 16, 2008
    Inventors: Jim M. Bowman, David J. Williams, Rajiv R. Singh, Hang T. Pham, Justin L. Becker
  • Azeotrope-like compositions of tetrafluoropropenes and bromofluoropropenes
    Publication number: 20080203349
    Abstract: Mixtures of tetrafluoropropenes with bromofluoropropenes provide compositions that have boiling points within an acceptable range, have good chemical stability, low GWP and are essentially non-flammable.
    Type: Application
    Filed: February 27, 2007
    Publication date: August 28, 2008
    Inventors: Rajiv R. Singh, David P. Wilson, Ian Shankland, Hang T. Pham
  • Azeotropic fumigant compositions of methyl iodide
    Publication number: 20080199408
    Abstract: Azeotropic and azeotrope-like compositions of methyl iodide and at least one fluorocarbon or hydrofluorocarbon such as 1,1,1,3,3-pentafluoropropane (HFC-245fa). The compositions are present as a gas, at temperatures of about 30° C. or below. The inventive compositions serve as a non-ozone-depleting gaseous fumigant which is useful in a variety of applications, in place of methyl bromide. These compositions serve as a drop-in replacement for gaseous methyl bromide, providing the benefits of a methyl iodide fumigant while also utilizing existing methyl bromide equipment.
    Type: Application
    Filed: February 16, 2007
    Publication date: August 21, 2008
    Inventors: Andrew J. Poss, Rajiv R. Singh, Hang T. Pham
  • Azeotrope-like trifluoroiodomethane compositions
    Patent number: 7413674
    Abstract: Provided are azeotrope-like compositions comprising difluoroethane and trifluoroiodomethane, azeotrope-like compositions comprising difluoroethane, tetrafluoropropene and trifluoroiodomethane, and uses thereof, including use in refrigerant compositions, refrigeration systems, blowing agent compositions, and aerosol propellants.
    Type: Grant
    Filed: April 16, 2004
    Date of Patent: August 19, 2008
    Assignee: Honeywell International Inc.
    Inventors: Rajiv R. Singh, David P. Wilson, Hang T. Pham
  • Azeotrope-like compositions of difluoromethane
    Patent number: 7396485
    Abstract: The invention relates to azeotropic and azeotrope-like mixtures of HFC-32, HCl, and Cl2, and processes for separating the azeotrope-like mixtures of HFC-32 and HCL and HFC-32, HCL and Cl2.
    Type: Grant
    Filed: August 20, 2007
    Date of Patent: July 8, 2008
    Assignee: Honeywell International Inc.
    Inventors: Hang T. Pham, Rajiv R. Singh, Hsueh Sung Tung, Franklin S. Wong
  • POLYMER PROCESSING SIMPLIFICATION
    Publication number: 20080153955
    Abstract: A process for the preparation of a fluoroolefin polymer from an azeotropic mixture of monomers having a constant composition, the process including the step of: contacting in a reaction zone: (i) an initiator; and (ii) an azeotropic mixture of monomers including at least one fluoroolefin and, optionally, at least one ethylenically unsaturated comonomer capable of copolymerizing therewith; wherein the contacting is carried out at a temperature, pressure and length of time sufficient to produce the fluoroolefin polymer.
    Type: Application
    Filed: December 20, 2007
    Publication date: June 26, 2008
    Inventors: George J. Samuels, Gregory J. Shafer, Hang T. Pham
  • Azeotrope-like compositions of 1,1,1,3,3-pentafluorobutane and hydrogen fluoride
    Patent number: 7361795
    Abstract: The invention relates to azeotropic and azeotrope-like mixtures of 1,1,1,3,3-pentafluorobutane (HFC-365) and hydrogen fluoride and a process for separating the azeotrope-like mixtures. The compositions of the invention are useful as an intermediate in the production of HFC-365. The latter is useful as a nontoxic, zero ozone depleting fluorocarbon useful as a solvent, blowing agent, refrigerant, cleaning agent and aerosol to propellant.
    Type: Grant
    Filed: October 14, 2003
    Date of Patent: April 22, 2008
    Assignee: Honeywell International, Inc.
    Inventors: Hang T. Pham, Rajiv R. Singh, Hsueh S. Tung
  • Azeotrope-like compositions of tetrafluoropropene and trifluoroiodomethane
    Patent number: 7341984
    Abstract: Provided are azeotrope-like compositions comprising tetrafluoropropene and trifluoroiodomethane and uses thereof, including use in refrigerant compositions, refrigeration systems, blowing agent compositions, and aerosol propellants.
    Type: Grant
    Filed: April 18, 2005
    Date of Patent: March 11, 2008
    Assignee: Honeywell International Inc.
    Inventors: David P. Wilson, Hang T. Pham, Rajiv R. Singh